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Handle delegatecall

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This commit is contained in:
Fridrik Asmundsson 2023-08-03 17:24:22 +00:00
parent 2c902db0e1
commit 392ef1beb7
1 changed files with 12 additions and 7 deletions
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19
node/impl/full/trace.go
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@ -86,6 +86,7 @@ type Action struct {
Input string `json:"input"`
Value ethtypes.EthBigInt `json:"value"`
// TODO: remove these fields from json output
Method abi.MethodNum `json:"method"`
CodeCid cid.Cid `json:"codeCid"`
}
@ -326,6 +327,8 @@ func buildTraces(traces *[]*Trace, parent *Trace, addr []int, et types.Execution
}
trace.setCallType("call")
// TODO: is it OK to check this here or is this only specific to certain edge case (evm to evm)?
if et.Msg.ReadOnly {
trace.setCallType("staticcall")
}
@ -398,12 +401,7 @@ func buildTraces(traces *[]*Trace, parent *Trace, addr []int, et types.Execution
// and should be dropped from the trace.
if builtinactors.IsEvmActor(parent.Action.CodeCid) && et.Msg.Method > 0 && et.Msg.Method <= 1023 {
log.Infof("found outbound call from an EVM actor on method 1-1023 method:%d, code:%s, height:%d", et.Msg.Method, et.Msg.CodeCid.String(), height)
for i, call := range et.Subcalls {
buildTraces(traces, trace, append(addr, i), call, height)
}
return
// TODO: if I handle this case and drop this call from the trace then I am not able to detect delegate calls
}
// EVM -> EVM calls
@ -422,7 +420,14 @@ func buildTraces(traces *[]*Trace, parent *Trace, addr []int, et types.Execution
// 1) Look for from an EVM actor to itself on InvokeContractDelegate, method 6.
// 2) Search backwards in the trace for a call to another actor (A) on method 3 (GetBytecode)
// 3) Treat this as a delegate call to actor A.
// TODO: implement this
if trace.Action.From == trace.Action.To && trace.Action.Method == builtin2.MethodsEVM.InvokeContractDelegate && len(*traces) > 0 {
// the previous trace should be the GetBytecode call
prev := (*traces)[len(*traces)-1]
if prev.Action.From == trace.Action.From && prev.Action.Method == builtin2.MethodsEVM.GetBytecode {
trace.setCallType("delegatecall")
trace.Action.To = prev.Action.To
}
}
}
*traces = append(*traces, trace)